Simplicity Mustang 480mm Walk Behind Mower Manual

Mfg. No: MCA489-BC

Mustang 480mm Walk Behind Mower

Copyright © Briggs & Stratton. All Rights reserved

25-Feb-2022

Blade Group (MCA489). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4

Chassis Group (MCA489). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6

Handles & Catcher Group (MCA489). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8

Torque Specification Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10 or

Not F

Reproduction

Copyright © Briggs & Stratton. All Rights reserved

3 25-Feb-2022

Note: Unless noted otherwise, use the standard torque specifications Mfg. No: MCA489-BC or

Not F

Reproduction

Copyright © Briggs & Stratton. All Rights reserved

4 25-Feb-2022

--

--

10

35

35

36

39a

39b

40

43

44

44

122Q72-0159-H1

CA09459G

CA09456G

CA09470S

CA09277P

CA09470P

EN72620B

EE14537B

EN72534D

EE14541B

EE14417A

EN73096A

QTY DESCRIPTION

* ENGINE, 850 Series Briggs & Stratton

BLADE DISC, Mulch or Catch

BLADE DISC, Catch

-(Catch Only)

KIT, Blade & Bolt, (1 Pair)

-(Set of 2)

KIT, Hardware, Blade, Washer, Nut , Bulk Pack (50 Pairs)

-(Bulk set of 50 pairs)

BLADE KIT, BULK PACK (40 PAIRS)

-(Bulk set of 40 pairs)

WASHER, 2 Stroke

WASHER, Blade Disc, 4st

NUT, Nylock, 2-Stroke models

BOLT, Blade Disc

SLEEVE

-(4 Stroke)

SLEEVE

-(2 Stroke) or

Not F

Reproduction

Note* To verify your specific engine model, please reference the ID Tag located on your engine. See your local Briggs & Stratton distributor for parts and service.

Copyright © Briggs & Stratton. All Rights reserved

5 25-Feb-2022

Note: Unless noted otherwise, use the standard torque specifications Mfg. No: MCA489-BC or

Not F

Reproduction

Copyright © Briggs & Stratton. All Rights reserved

6 25-Feb-2022

9

9

22

23

24

25

18

19

20

21

15

16

17

17

10

13

13a

14

30

31

32

33

34

26

27

28

29

QTY DESCRIPTION

CH86282R

CH86282G

CH85865A

CH86260AW

CH82917A

CH84861A

CH86277A

HA20440D

CH86250B

CH86250F

HA25849A

CH86259A

CH86258A

CH86281A

CH86270G

CH86268D

CH85943A

HA20436D

CH86262AW

CH86276A

CH86308A

CH86271A

HA25839A

CH86298P

Not F

CH82670B

HA21186D

Rear flap assembly

-(Blue)

Rear flap assembly

-(Black)

SPRING, Rear Flap

AXLE, Rear

KNOB, Height Adjuster

BUSHING, Rear Axle

SKIRT, Rear

SCREW, Rear Axle Retainer

BASEPLATE, Blue

BASEPLATE, Antique Silver

HOSE CONNECTION

SIDE TRIM, Right

SIDE TRIM, Left

SEGMENT, Height Adjustment

MULCH PLUG, Black

LINK, Connecting

SPRING, Connecting Link

SCREW, Side Trim

AXLE, Front or Reproduction

BUSHING, Wheel

WHEEL ASSEMBLY

BEARING, Wheel, 14.1 x 28.0mm 8 off

RETAINER, Wheel

HUB CAP

RETAINER, Front Axle

SCREW, Front Axle Retainer

Copyright © Briggs & Stratton. All Rights reserved

7 25-Feb-2022

Note: Unless noted otherwise, use the standard torque specifications Mfg. No: MCA489-BC or

Not F

Reproduction

Copyright © Briggs & Stratton. All Rights reserved

8 25-Feb-2022

41

42

48

49

50

1

6

7

8a

8b

41

CH86205GT

CH86781P

CH86202GW

HA20439D

-----

GC11765P

GC11792P

GC11767V

CH86177D

TC05020A

-----

QTY DESCRIPTION

HANDLE, Upper, Comfort Grip

LOCKING LEVER PACK

HANDLE, Lower, Looped

BOLT, Lower handle

NUT, Nylock, M8

CATCHER ASSEMBLY

-(Blue and Silver)

CATCHER ASSEMBLY

-(Black)

VENT & MESH PACK, Adjustable Vents, Silver

GUIDE, Starter Cord

-(Optional Item. Not included on all models.)

THROTTLE CONTROL

NUT, Nylock, M5

-(Optional Item. Not included on all models.)

Not F or Reproduction

Copyright © Briggs & Stratton. All Rights reserved

9 25-Feb-2022

Hardware Identification & Torque Specifications

Torque Specification Chart

FOR STANDARD METRIC MACHINE HARDWARE (Tolerance ± 20%)

Torque Specification Chart

FOR STANDARD MACHINE HARDWARE (Tolerance ± 20%)

0

Property

Class

5.6

8.8

10.9

12.9

Class 5.6

Class 8.8

Class 10.9

Class 12.9

Size Of

Hardware in/lbs ft/lbs Nm.

in/lbs ft/lbs Nm.

in/lbs ft/lbs Nm.

in/lbs ft/lbs Nm.

M12

M14

M16

M18

M20

M22

M24

M27

M3

M4

M5

M6

M7

M8

M10

M30

M33

M36

M39

5.88

.56

13.44

1.28

26.4

2.50

44.64

4.3

5.2

7.1

7.7

10.5

15

26

21

36

42 58

64 88

89 121

126 171

169 230

217 295

320 435

435 590

590 800

759 1030

988 1340

13.44

30.72

60.96

7.3

12.1

17.7

35

61

101

147

202

290

390

497

733

995

1349

1740

2249

1.28

2.90

5.75

9.9

16.5

24

48

83

132

200

275

390

530

375

995

1350

1830

2360

3050

1032

1401

1902

2441

3163

287

405

559

708

19.2

43.44

5.97

10.3

16.9

25

50

86.2

136

210

550

745

960

1400

117

185

285

390

1.80

4.10

8.10

14

23

34

67

1900

2580

3310

4290

22.92

2.15

52.56

4.95

7.15

9.7

12.1

16.5

19.9

29

59

27

40

81

103 140

162 220

250 340

346 470

486 660

656 890

840 1140

1239 1680

1681 2280

2278 3090

2935 3980

3798 5150

The guides and ruler furnished below are designed to help you select the appropriate hardware.

10 20 30 40 50 60 70 80 90 100

Nut, M8

Body

Diameter

Body Length

Screw, M8- 1.25 x 25

0

Thread

Diameter (mm)

Inside

Diameter (in)

Threads per inch

1/4

Nut, 1/2-16

1/2

3/4

1

1/4

Thread

Diameter (mm)

Body

Diameter

1/2

3/4

Distance between threads (mm)

Threads per inch

Body

Length (mm)

Body

Length (in)

2

Screw, 1/2- 16 x 2

1/4

1/2

3/4

3

1/4

1/2

3/4

4

Hardware

Grade

No

Marks

SAE Grade 2

Size Of in/lbs

Hardware ft/lbs Nm.

SAE Grade 5 in/lbs ft/lbs Nm.

SAE Grade 8 in/lbs ft/lbs Nm.

8-32

8-36

10-24

10-32

1/4-20

1/4-28

5/16-18

5/16-24

3/8-16

3/8-24

7/16-14

7/16-20

1/2-13

1/2-20

9/16-12

9/16-18

5/8-11

5/8-18

3/4-10

3/4-16

7/8-9

7/8-14

1-8

1-12

19

20

27

31

66

76

140

7.6

8.6

11 15.0

12

20

23

30

35

50

55

65

75

90

100

160 217.6

180 244.8

155

220

240

2.1

2.3

3.1

3.5

16.3

27.2

31.3

40.8

47.6

68.0

74.8

88.4

102.0

122.4

136

190.4

210.8

299.2

326.4

30

31

43

49

8

19

30

35

50

55

75

90

110

3.4

3.5

4.9

5.5

10.9

10 13.6

17 23.1

25.8

40.8

47.6

68.0

74.8

102.0

122.4

149.6

41

43

60

68

12

14

25

29

45

50

70

34.0

61.2

68.0

95.2

80 108.8

110 149.6

120 163.2

150 204.0

4.6

4.9

6.8

7.7

16.3

19.0

34.0

120 163.2

150 204.0

180 244.8

260 353.6

300 408.0

170

220

240

231.2

299.2

326.4

386 525.0

420 571.2

400 544.0

440 598.4

600 816.0

660 897.6

580 788.8

900 1,244.0

640 870.4

1,000 1,360.0

NOTES

1. These torque values are to be used for all hardware excluding: locknuts, self-tapping screws, thread forming screws, sheet metal screws and socket head setscrews.

2. Recommended seating torque values for locknuts: a. for prevailing torque locknuts - use 65% of grade 5 torques.

b. for flange whizlock nuts and screws - use 135% of grade 5 torques.

3. Unless otherwise noted on assembly drawings, all torque values must meet this specification.

Common Hardware Types

Hex Head Capscrew

Washer

Standard Hardware Sizing

When a washer or nut is identified as 1/2” (M8), this is the Nominal size , meaning the inside diameter is 1/2 inch

(8mm metric thread diameter); if a second number is present it represents the threads per inch (distance between threads).

When bolt or capscrew is identified as 1/2 - 16 x 2” (M8 - 1.25 x 50), this means the Nominal size , or body diameter is 1/2 inch (8mm metric thread diameter), the second number,16, represents the threads per inch, (distance between threads). The final number is the body length of the bolt or screw, 2 inches (50mm).

Carriage Bolt

Wrench & Fastener Size Guide

Lockwasher

Hex Nut

1/4” Bolt or Nut

Wrench—7/16”

M6 Bolt or Nut

Wrench—10mm

5/16” Bolt or Nut

Wrench—1/2”

M8 Bolt or Nut

Wrench—13mm

3/8” Bolt or Nut

Wrench—9/16”

M10 Bolt or Nut

Wrench—17mm

7/16” Bolt or Nut

Wrench (Bolt)—5/8”

Wrench (Nut)—11/16”

1/2” Bolt or Nut

Wrench—3/4”

M12 Bolt or Nut

Wrench—19mm

M14 Bolt or Nut

Wrench—22 mm

Copyright © Briggs & Stratton. All Rights reserved

25-Feb-2022